/Engine/Source/Runtime/SlateCore/Public/Widgets/Images/SLayeredImage.h
Adds a new layer to the top of the Image given a brush and color. Use White as the default color.
void AddLayer ( [TAttribute](API\Runtime\Core\Misc\TAttribute)< const [FSlateBrush](API\Runtime\SlateCore\Styling\FSlateBrush) * > Brush )